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V125BC [204]
2 years ago
5

A chair is on sale at a price of £20.80. This is a 20% reduction of the normal price what was the price of the chair before the

reduction
Mathematics
1 answer:
Vladimir [108]2 years ago
8 0

Answer:

Explanation is in photo

Step-by-step explanation:

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on the day their child was born, her parents deposited $15,000 in a savings account that earns 10% interest annually. how much i
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15,000 * (1.1)^16

I don't have a calculator on me to do it but that's the working.
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Explain how to identify a starting position on a line.
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it depends on the type of line but for a straight line the starting point is always the edge that is A

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I need help with this proof
Maksim231197 [3]

Answer:

See explanation

Step-by-step explanation:

Consider two triangles ABF and EDF. These triangles are two right triangles, because angles B and D are right anges.

In these triangles,

  • ∠ABF ≅ ∠EDF - as two right angles;
  • BF ≅ FE - given;
  • ∠AFB ≅ ∠EFD - as vertical angles when two lines AD and BE itersect.

By ASA postulate (or HA postulate) these triangles are congruent, so

ΔABF ≅ ΔEDF

Congruent triangles have congruent corresponding parts, so

FA ≅ EF

6 0
3 years ago
What is the y-intercept of the equation of the line that is perpendicular to the line y =
igor_vitrenko [27]

Answer:

y=-5/3x+20

Step-by-step explanation:

Let the equation of the required line be represented as \[y=mx+c\]

This line is perpendicular to the line \[y=\frac{3}{5}x+10\]

\[=>m*\frac{3}{5}=-1\]

\[=>m=\frac{-5}{3}\]

So the equation of the required line becomes \[y=\frac{-5}{3}x+c\]

This line passes through the point (15.-5)

\[-5=\frac{-5}{3}*15+c\]

\[=>c=20\]

So the equation of the required line is \[y=\frac{-5}{3}x+20\]

Among the given options, option 4 is the correct one.

3 0
3 years ago
What's the inverse of a 2x4 matrix?
balandron [24]
Mxn Matrices do not have an inverse solution for m ≠ n, so your 2x4 will not have a solution. 

<span>Generally, inverting matrices is done through finding the determinant of the square matrix and then performing an operation on the matrix based on the size of the matrix. </span>

<span>Wikipedia has a good article on Matrix inversion, take a look there for more information.</span>
8 0
3 years ago
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